This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

Throughout history, people have used song as a teaching and memory tool. This project explores whether song improves a person's ability to retain information.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

This science fair project investigates why the number of visible stars changes from place to place.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

The goal of this project is to create an exciting topographical map out of dough.

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.

Have you ever noticed the ridges on a dog's nose? In this project, we take several dogs' nose prints and discover just how unique they are!

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

Discover that the absorbency of fabrics depend largely on the shape and structure of the individual fibers that make up the fabric.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

This science fair project idea produces sounds by creating vibrations using different objects.

This project determines what category of person is most likely to be ticklish.

Examine the effect of pressure on carbonation in soda.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

This science fair project idea examines which type of insulation holds in the most heat.

This science fair project idea explores the different properties of matter.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

Construct and experiment with a periscope using reflected light rays to gather an image.

This science fair project idea explores whether talking to a plant will help it grow.

In this science fair project, learn how a mineral streak is made and how it can help identify an unknown mineral.

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.